50 AUSTRALIAN MALACOSTRACA. 



this ; the fingers black the black extending backwards for some 

 distance on the palm. Length 7/16ths inch ; breadth ll/16ths. 



The locality of the two preceding species is doubtful. 



X. atromanus is distinguished from X. pachydactylus, A. Milne- 

 Edwards, by the presence of the rows of tubercles on the outer 

 surface of the hands and other points. 



80. Xanthodes scaber. A.M. 

 Cancer scaber, Eabr., Suppl., p. 336. 



Xantho scaber, M.-Edw., Hist. Nat. Crust., t. i., p. 390. 



Carapace very granular everywhere and strongly embossed in 

 front, but without conspicuous prominences or sulci on the 

 cardiac region and the corresponding portion of the branchial 

 regions. Antero-lateral borders strongly curved, and divided 

 into'f our indistinct lobes. Pterygostomial regions granular and 

 marked with small grooves contiuuous with the notches between 

 the lobes of the antero-lateral margins. Postero-lateral borders 

 straight. Hands broader than in X. setiger ; fingers without 

 distinct canaliculi. [M.-Edw.~] 



This species is nearly allied to X. LamarcTcii, but the antero- 

 lateral lobes are very indistinct, and . the outer surface of the 

 hand is not grooved. 



Holborn Island, near Port Denison, collected by Mr. Alex. 

 Morton ; Low Island (Macleay Museum). 



G-enus Ctcloxantiitts, A. Milne-Edwards. 



Allied to Xantho, but with the front extremely prominent, the 

 antero-lateral borders long and strongly curved behind ; the 

 third joint of the external maxillipedes sub-quadrilateral ; the 

 abdomen of the male consists of five moveable joints. 



81. Cycloxanthus punctatus. 



Cycloxanthus punctatus, Haswell, Proc. Linn. Soc. N.S.W., 

 Vol. vi. 



Carapace with the regions well defined, ornamented with 

 scattered punctations ; front very prominent, entire, deflexed ; 



